I'm all for cheaper plans and paying for what I use. But I still can't make a damn phone call on AT&T in SF. Dropping a call after getting through to my sister

I'm all for cheaper plans and paying for what I use. But I still can't make a damn phone call on AT&T in SF. Dropping a call after getting through to my sister in the hospital or while phone sexing a lady friend brings about a rage inside me that I never knew existed. My iPhone 3G contract is up any day now and theres no way I'll get another iPhone on AT&T without testing an android phone on another carrier.